\begin{filecontents}{\jobname.bib}
@book{test1,
author = {Mustermann, Max},
title = {Mustertext},
year = {2016}
}
@book{test2,
author = {Musterfrau, Maxim},
title = {Ich weiß es besser},
year = {2015}
}
\end{filecontents}
\documentclass{scrreprt}
\usepackage{selinput}
\SelectInputMappings{
adieresis={ä},
germandbls={ß},
}
\usepackage[ngerman]{babel}
\usepackage[T1]{fontenc}
\usepackage[style=authoryear-icomp, backend=biber ]{biblatex}
\addbibresource{\jobname.bib}
\usepackage[babel,german=quotes,threshold=3]{csquotes}
\let\mkccitation\mkcitation
\begin{document}
\blockcquote[1]{test1}{Ein Beispiel Text.}
Laut \cite{test2} soll die Jahreszahl hier in Klammern stehen.
\end{document}
Lieben Dank.
